This etymological dictionary contains data relating to the reconstruction of each of the 8 branches within the OtoMangean stock, as well as items that belong to Eastern OtoMangean, Western OtoMangean, and proto-OtoMangean. It does not necessarily contain data supporting the reconstructions for the 8 branches; the coverage there is spotty, but the reconstructions for any of the 8 branches are believed to be reliable. This is a pioneering work, and much more work can and should be carried out. There are approximately 3000 cognate set presented, with reconstructions.